Clin Orthop Surg.  2010 Jun;2(2):121-124. 10.4055/cios.2010.2.2.121.

Multidirectional Instability Accompanying an Inferior Labral Cyst

• Moon CY
• Ji JH
• Kim SJ

• KMID: 1719339
• DOI: http://doi.org/10.4055/cios.2010.2.2.121

Abstract

Paralabral cyst of the shoulder joint can be observed in 2% to 4% of the general population, particularly in men during the third and fourth decade. On average, these cysts measure 10 mm to 20 mm in diameter and are located preferentially on the postero-superior aspect of the glenoid. The MRI has increased the frequency of the diagnosis of paralabral cysts of the shoulder joint. Paralabral cysts of the shoulder joint usually develop in the proximity of the labrum. The relationship between shoulder instability and labral tears is well known, however, the association of shoulder instability with a paralabral cyst is rare. Shoulder instability may cause labral injury or labral injury may cause shoulder instability, and then injured tear develops paralabral cyst. In our patient, the inferior paralabral cyst may be associated with inferior labral tears and instability MRI.

Keyword

Shoulder; Instability; Inferior labral cyst

MeSH Terms

*Arthroscopy
Cysts/complications/*diagnosis/surgery
Humans
Joint Instability/complications/surgery
*Magnetic Resonance Imaging
Male
Shoulder Dislocation/complications/surgery
*Shoulder Joint/pathology/surgery
Young Adult

Figure

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  Fig. 1 MRI of the left shoulder demonstrates a multiseptated cyst at the inferior aspect of the glenoid neck and a suspected labral tear (arrows).

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  Fig. 2 The arthroscopic findings showed a 2 × 1 cm multilobulated cyst at the antero-inferior labrum from 4 o'clock to 6 o'clock, and the cyst was filled with mucinous fluid (A) Incomplete detachment of the inferior labrum and a marginal crack could be detected (B) but complete detachment of the postero-inferior labrum was confirmed with a probe.

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  Fig. 3 The arthroscopic photograph shows complete suturing of the capsular plication (A), the antero-inferior labral repair (B), and the postero-inferior labral repair (C).

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  Fig. 4 The previously noted cyst is no longer seen on the postoperative follow-up MRI.

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